command would have simply listed the answer. However, in this case, a few subtle reminders
were included. The debug output on Albuquerque and Seville shows PPP output on
Albuquerque's S0 interface and LAPB output for Seville's S1 interface. The show ipx route
commands also happen to list the encapsulation for connected networks. Table 8-53
summarizes the details.
announces the IP addresses on each end of the link, the IOS decides to add a host route
specifically to that IP address. For example, Albuquerque has a route to 199.1.1.128/27 (subnet
on serial link to Yosemite) and to 199.1.1.130/32 (Yosemite's address on that same link). The
/32 signifies that the route is a host route.
commands for most subinterfaces are provided, and these list the IP address and mask used. The
show cdp neighbor detail commands also mentioned the IP address of the connected routers.
addresses was the show cdp neighbor detail command, which was used in Examples 8-37,
8-38, and 8-39. The show frame-relay map command should seemingly have provided that
information, but because all the subinterfaces are point-to-point, no true mapping is needed.
The subinterface acts like a point-to-point link, so the neighboring router's IPX address is
not shown in the show frame-relay map command output. A debug frame-relay events
command, which shows output for Inverse ARP flows, could have identified the IPX addresses,
but Inverse ARP is not enabled on point-to-point subinterfaces because it is not needed.